Implements `DynSignatureAlgorithmIdentifier` trait for ed25519#712

tarcieri merged 4 commits intodalek-cryptography:maindalek-cryptography/curve25519-dalek:mainfrom

juliusl:pr/impl-spki-algo-identifier-traitjuliusl/curve25519-dalek:pr/impl-spki-algo-identifier-traitCopy head branch name to clipboard